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Contact Green Mountain Energy

New York customers can reach Green Mountain Energy at 1-800-636-5690. Contact information for other states is below.

Residential Customer Service

You can contact Green Mountain Energy customer service with questions about service, rates, billing, and more. Contact information depends on which state you live in:

State Main Phone Number New Customers Hours
Illinois 1-800-274-5289 1-855-IL-GOGREEN (1-855-454-6473) 7AM - 5PM, Monday through Friday (CST)
Maryland 1-877-473-3646 1-855-MD-GOGREEN (1-855-634-6473) 8AM - 6 PM, Monday through Friday (EST)
New Jersey Contact New Jersey government's Energy Choice line at 1-800-624-0241    
New York 1-800-636-5690 1-877-216-4632 8AM - 6 PM, Monday through Friday (EST)
Oregon Contact Oregon government's Energy Choice line at 1-800-522-2404    
Pennsylvania 1-800-286-5856 1-855-PA-GOGREEN (855-724-6473) 8AM - 6 PM, Monday through Friday (EST)
Texas 1-866-785-4668 1-866-301-3120

General Customer Service:

  • 7AM - 10PM, Monday through Friday (CST)
  • 9 AM - 5 PM, Saturday (CST)

New Customers:

  • 7AM - 10PM, Monday through Friday (CST)
  • 10 AM - 5 PM, Saturday (CST)

New Jersey customers of Green Mountain Energy should contact their local utility for customer service needs.

Email or Contact Online

Depending on your state, you can contact Green Mountain Energy via email or on an online form regarding service questions, rate issues, and more.

Contact By Mail

New Jersey and New York customers can write to the following address:

Green Mountain Energy Company
342 Broadway, Box 318
New York, NY 10013

Commercial Customers

Commercial customers can reach Green Mountain Energy via telephone or email.

State Customer Service Phone Numbers Hours Email Address
New York 1-800-455-8545 8:30 AM - 7 PM, Monday through Friday nybizcs@greenmountain.com
New Jersey 1-888-232-3658 8:00 AM - 7 PM, Monday through Friday customercare@greenmountain.com
Pennsylvania 1-888-232-3658 8:00 AM - 7 PM, Monday through Friday customercare@greenmountain.com
Texas New Customers:
855-GMEC-4TX (855-463-2489)
Existing Customers:
1-866-280-3603
7:00 AM - 7 PM, Monday through Friday gmecbizcare@greenmountain.com

Corporate Contacts

Green Mountain Energy's headquarters is located at the following address:

Green Mountain Energy
300 West 6th Street, Suite 1600
Austin, Texas 78701

Phone Numbers

You can reach the corporate office at 1-512-691-6100. A corporate employee directory is available at 1-888-380-9410.

Further Information

Read more about Green Mountain Energy, check out customer reviews for the company, or compare reviews with other suppliers.

You can also read about Green Mountain Energy rates in New York state.

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